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Diffstat (limited to 'gnu/usr.bin/perl/eg/relink')
| -rw-r--r-- | gnu/usr.bin/perl/eg/relink | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/gnu/usr.bin/perl/eg/relink b/gnu/usr.bin/perl/eg/relink new file mode 100644 index 0000000..69956c9 --- /dev/null +++ b/gnu/usr.bin/perl/eg/relink @@ -0,0 +1,91 @@ +#!/usr/bin/perl +'di'; +'ig00'; +# +# $Header: /home/cvs/386BSD/ports/lang/perl/eg/relink,v 1.1.1.1 1993/08/23 21:29:43 nate Exp $ +# +# $Log: relink,v $ +# Revision 1.1.1.1 1993/08/23 21:29:43 nate +# PERL! +# +# Revision 4.0 91/03/20 01:11:40 lwall +# 4.0 baseline. +# +# Revision 3.0.1.2 90/08/09 03:17:44 lwall +# patch19: added man page for relink and rename +# + +($op = shift) || die "Usage: relink perlexpr [filenames]\n"; +if (!@ARGV) { + @ARGV = <STDIN>; + chop(@ARGV); +} +for (@ARGV) { + next unless -l; # symbolic link? + $name = $_; + $_ = readlink($_); + $was = $_; + eval $op; + die $@ if $@; + if ($was ne $_) { + unlink($name); + symlink($_, $name); + } +} +############################################################################## + + # These next few lines are legal in both Perl and nroff. + +.00; # finish .ig + +'di \" finish diversion--previous line must be blank +.nr nl 0-1 \" fake up transition to first page again +.nr % 0 \" start at page 1 +';<<'.ex'; #__END__ ############# From here on it's a standard manual page ############ +.TH RELINK 1 "July 30, 1990" +.AT 3 +.SH LINK +relink \- relinks multiple symbolic links +.SH SYNOPSIS +.B relink perlexpr [symlinknames] +.SH DESCRIPTION +.I Relink +relinks the symbolic links given according to the rule specified as the +first argument. +The argument is a Perl expression which is expected to modify the $_ +string in Perl for at least some of the names specified. +For each symbolic link named on the command line, the Perl expression +will be executed on the contents of the symbolic link with that name. +If a given symbolic link's contents is not modified by the expression, +it will not be changed. +If a name given on the command line is not a symbolic link, it will be ignored. +If no names are given on the command line, names will be read +via standard input. +.PP +For example, to relink all symbolic links in the current directory +pointing to somewhere in X11R3 so that they point to X11R4, you might say +.nf + + relink 's/X11R3/X11R4/' * + +.fi +To change all occurences of links in the system from /usr/spool to /var/spool, +you'd say +.nf + + find / -type l -print | relink 's#/usr/spool#/var/spool#' + +.fi +.SH ENVIRONMENT +No environment variables are used. +.SH FILES +.SH AUTHOR +Larry Wall +.SH "SEE ALSO" +ln(1) +.br +perl(1) +.SH DIAGNOSTICS +If you give an invalid Perl expression you'll get a syntax error. +.SH BUGS +.ex |
